I have myasthenia gravis and I also have the start of macular degeneration (dry) which was discovered approximately 5 years ago when I was having many eye problems some related to myasthenia gravis and some not! It was actually my optician who noticed it not the eye hospital! No surprise there! (NHS) . In my case it runs in our family , great grandma , grandma and two aunties with it my grandma and one auntie has the wet which you need injections for very quickly or you can become blind as my auntie has in one eye. I was told to eat a handful of walnuts everyday and eat plenty of spinach and green veg it's supposed to slow the progression of the disease down but I don't know if that is true or not. I also have an auntie with myasthenia gravis and my daughter has recently tested positive for it with many symptoms we are waiting for her to see a decent neurologist! NHS again!! i am taking mestinon but never taken predisolone I have read something on the internet saying that few people do have myasthenia gravis and macular degeneration but it didn't say anything about it making it worse